drivers/net/cxgb3/cxgb3_offload.c

   1 /*
   2  * Copyright (c) 2006-2007 Chelsio, Inc. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/list.h>
  34 #include <net/neighbour.h>
  35 #include <linux/notifier.h>
  36 #include <asm/atomic.h>
  37 #include <linux/proc_fs.h>
  38 #include <linux/if_vlan.h>
  39 #include <net/netevent.h>
  40 #include <linux/highmem.h>
  41 #include <linux/vmalloc.h>
  42
  43 #include "common.h"
  44 #include "regs.h"
  45 #include "cxgb3_ioctl.h"
  46 #include "cxgb3_ctl_defs.h"
  47 #include "cxgb3_defs.h"
  48 #include "l2t.h"
  49 #include "firmware_exports.h"
  50 #include "cxgb3_offload.h"
  51
  52 static LIST_HEAD(client_list);
  53 static LIST_HEAD(ofld_dev_list);
  54 static DEFINE_MUTEX(cxgb3_db_lock);
  55
  56 static DEFINE_RWLOCK(adapter_list_lock);
  57 static LIST_HEAD(adapter_list);
  58
  59 static const unsigned int MAX_ATIDS = 64 * 1024;
  60 static const unsigned int ATID_BASE = 0x10000;
  61
  62 static inline int offload_activated(struct t3cdev *tdev)
  63 {
  64         const struct adapter *adapter = tdev2adap(tdev);
  65
  66         return (test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map));
  67 }
  68
  69 /**
  70  *      cxgb3_register_client - register an offload client
  71  *      @client: the client
  72  *
  73  *      Add the client to the client list,
  74  *      and call backs the client for each activated offload device
  75  */
  76 void cxgb3_register_client(struct cxgb3_client *client)
  77 {
  78         struct t3cdev *tdev;
  79
  80         mutex_lock(&cxgb3_db_lock);
  81         list_add_tail(&client->client_list, &client_list);
  82
  83         if (client->add) {
  84                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
  85                         if (offload_activated(tdev))
  86                                 client->add(tdev);
  87                 }
  88         }
  89         mutex_unlock(&cxgb3_db_lock);
  90 }
  91
  92 EXPORT_SYMBOL(cxgb3_register_client);
  93
  94 /**
  95  *      cxgb3_unregister_client - unregister an offload client
  96  *      @client: the client
  97  *
  98  *      Remove the client to the client list,
  99  *      and call backs the client for each activated offload device.
 100  */
 101 void cxgb3_unregister_client(struct cxgb3_client *client)
 102 {
 103         struct t3cdev *tdev;
 104
 105         mutex_lock(&cxgb3_db_lock);
 106         list_del(&client->client_list);
 107
 108         if (client->remove) {
 109                 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
 110                         if (offload_activated(tdev))
 111                                 client->remove(tdev);
 112                 }
 113         }
 114         mutex_unlock(&cxgb3_db_lock);
 115 }
 116
 117 EXPORT_SYMBOL(cxgb3_unregister_client);
 118
 119 /**
 120  *      cxgb3_add_clients - activate registered clients for an offload device
 121  *      @tdev: the offload device
 122  *
 123  *      Call backs all registered clients once a offload device is activated
 124  */
 125 void cxgb3_add_clients(struct t3cdev *tdev)
 126 {
 127         struct cxgb3_client *client;
 128
 129         mutex_lock(&cxgb3_db_lock);
 130         list_for_each_entry(client, &client_list, client_list) {
 131                 if (client->add)
 132                         client->add(tdev);
 133         }
 134         mutex_unlock(&cxgb3_db_lock);
 135 }
 136
 137 /**
 138  *      cxgb3_remove_clients - deactivates registered clients
 139  *                             for an offload device
 140  *      @tdev: the offload device
 141  *
 142  *      Call backs all registered clients once a offload device is deactivated
 143  */
 144 void cxgb3_remove_clients(struct t3cdev *tdev)
 145 {
 146         struct cxgb3_client *client;
 147
 148         mutex_lock(&cxgb3_db_lock);
 149         list_for_each_entry(client, &client_list, client_list) {
 150                 if (client->remove)
 151                         client->remove(tdev);
 152         }
 153         mutex_unlock(&cxgb3_db_lock);
 154 }
 155
 156 static struct net_device *get_iff_from_mac(struct adapter *adapter,
 157                                            const unsigned char *mac,
 158                                            unsigned int vlan)
 159 {
 160         int i;
 161
 162         for_each_port(adapter, i) {
 163                 struct vlan_group *grp;
 164                 struct net_device *dev = adapter->port[i];
 165                 const struct port_info *p = netdev_priv(dev);
 166
 167                 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
 168                         if (vlan && vlan != VLAN_VID_MASK) {
 169                                 grp = p->vlan_grp;
 170                                 dev = NULL;
 171                                 if (grp)
 172                                         dev = vlan_group_get_device(grp, vlan);
 173                         } else
 174                                 while (dev->master)
 175                                         dev = dev->master;
 176                         return dev;
 177                 }
 178         }
 179         return NULL;
 180 }
 181
 182 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
 183                               void *data)
 184 {
 185         int ret = 0;
 186         struct ulp_iscsi_info *uiip = data;
 187
 188         switch (req) {
 189         case ULP_ISCSI_GET_PARAMS:
 190                 uiip->pdev = adapter->pdev;
 191                 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
 192                 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
 193                 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
 194                 /*
 195                  * On tx, the iscsi pdu has to be <= tx page size and has to
 196                  * fit into the Tx PM FIFO.
 197                  */
 198                 uiip->max_txsz = min(adapter->params.tp.tx_pg_size,
 199                                      t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
 200                 /* on rx, the iscsi pdu has to be < rx page size and the
 201                    whole pdu + cpl headers has to fit into one sge buffer */
 202                 uiip->max_rxsz = min_t(unsigned int,
 203                                        adapter->params.tp.rx_pg_size,
 204                                        (adapter->sge.qs[0].fl[1].buf_size -
 205                                         sizeof(struct cpl_rx_data) * 2 -
 206                                         sizeof(struct cpl_rx_data_ddp)));
 207                 break;
 208         case ULP_ISCSI_SET_PARAMS:
 209                 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
 210                 break;
 211         default:
 212                 ret = -EOPNOTSUPP;
 213         }
 214         return ret;
 215 }
 216
 217 /* Response queue used for RDMA events. */
 218 #define ASYNC_NOTIF_RSPQ 0
 219
 220 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
 221 {
 222         int ret = 0;
 223
 224         switch (req) {
 225         case RDMA_GET_PARAMS: {
 226                 struct rdma_info *rdma = data;
 227                 struct pci_dev *pdev = adapter->pdev;
 228
 229                 rdma->udbell_physbase = pci_resource_start(pdev, 2);
 230                 rdma->udbell_len = pci_resource_len(pdev, 2);
 231                 rdma->tpt_base =
 232                         t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
 233                 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
 234                 rdma->pbl_base =
 235                         t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
 236                 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
 237                 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
 238                 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
 239                 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
 240                 rdma->pdev = pdev;
 241                 break;
 242         }
 243         case RDMA_CQ_OP:{
 244                 unsigned long flags;
 245                 struct rdma_cq_op *rdma = data;
 246
 247                 /* may be called in any context */
 248                 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
 249                 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
 250                                         rdma->credits);
 251                 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
 252                 break;
 253         }
 254         case RDMA_GET_MEM:{
 255                 struct ch_mem_range *t = data;
 256                 struct mc7 *mem;
 257
 258                 if ((t->addr & 7) || (t->len & 7))
 259                         return -EINVAL;
 260                 if (t->mem_id == MEM_CM)
 261                         mem = &adapter->cm;
 262                 else if (t->mem_id == MEM_PMRX)
 263                         mem = &adapter->pmrx;
 264                 else if (t->mem_id == MEM_PMTX)
 265                         mem = &adapter->pmtx;
 266                 else
 267                         return -EINVAL;
 268
 269                 ret =
 270                         t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
 271                                         (u64 *) t->buf);
 272                 if (ret)
 273                         return ret;
 274                 break;
 275         }
 276         case RDMA_CQ_SETUP:{
 277                 struct rdma_cq_setup *rdma = data;
 278
 279                 spin_lock_irq(&adapter->sge.reg_lock);
 280                 ret =
 281                         t3_sge_init_cqcntxt(adapter, rdma->id,
 282                                         rdma->base_addr, rdma->size,
 283                                         ASYNC_NOTIF_RSPQ,
 284                                         rdma->ovfl_mode, rdma->credits,
 285                                         rdma->credit_thres);
 286                 spin_unlock_irq(&adapter->sge.reg_lock);
 287                 break;
 288         }
 289         case RDMA_CQ_DISABLE:
 290                 spin_lock_irq(&adapter->sge.reg_lock);
 291                 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
 292                 spin_unlock_irq(&adapter->sge.reg_lock);
 293                 break;
 294         case RDMA_CTRL_QP_SETUP:{
 295                 struct rdma_ctrlqp_setup *rdma = data;
 296
 297                 spin_lock_irq(&adapter->sge.reg_lock);
 298                 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
 299                                                 SGE_CNTXT_RDMA,
 300                                                 ASYNC_NOTIF_RSPQ,
 301                                                 rdma->base_addr, rdma->size,
 302                                                 FW_RI_TID_START, 1, 0);
 303                 spin_unlock_irq(&adapter->sge.reg_lock);
 304                 break;
 305         }
 306         default:
 307                 ret = -EOPNOTSUPP;
 308         }
 309         return ret;
 310 }
 311
 312 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
 313 {
 314         struct adapter *adapter = tdev2adap(tdev);
 315         struct tid_range *tid;
 316         struct mtutab *mtup;
 317         struct iff_mac *iffmacp;
 318         struct ddp_params *ddpp;
 319         struct adap_ports *ports;
 320         struct ofld_page_info *rx_page_info;
 321         struct tp_params *tp = &adapter->params.tp;
 322         int i;
 323
 324         switch (req) {
 325         case GET_MAX_OUTSTANDING_WR:
 326                 *(unsigned int *)data = FW_WR_NUM;
 327                 break;
 328         case GET_WR_LEN:
 329                 *(unsigned int *)data = WR_FLITS;
 330                 break;
 331         case GET_TX_MAX_CHUNK:
 332                 *(unsigned int *)data = 1 << 20;        /* 1MB */
 333                 break;
 334         case GET_TID_RANGE:
 335                 tid = data;
 336                 tid->num = t3_mc5_size(&adapter->mc5) -
 337                     adapter->params.mc5.nroutes -
 338                     adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
 339                 tid->base = 0;
 340                 break;
 341         case GET_STID_RANGE:
 342                 tid = data;
 343                 tid->num = adapter->params.mc5.nservers;
 344                 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
 345                     adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
 346                 break;
 347         case GET_L2T_CAPACITY:
 348                 *(unsigned int *)data = 2048;
 349                 break;
 350         case GET_MTUS:
 351                 mtup = data;
 352                 mtup->size = NMTUS;
 353                 mtup->mtus = adapter->params.mtus;
 354                 break;
 355         case GET_IFF_FROM_MAC:
 356                 iffmacp = data;
 357                 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
 358                                                 iffmacp->vlan_tag &
 359                                                 VLAN_VID_MASK);
 360                 break;
 361         case GET_DDP_PARAMS:
 362                 ddpp = data;
 363                 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
 364                 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
 365                 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
 366                 break;
 367         case GET_PORTS:
 368                 ports = data;
 369                 ports->nports = adapter->params.nports;
 370                 for_each_port(adapter, i)
 371                         ports->lldevs[i] = adapter->port[i];
 372                 break;
 373         case ULP_ISCSI_GET_PARAMS:
 374         case ULP_ISCSI_SET_PARAMS:
 375                 if (!offload_running(adapter))
 376                         return -EAGAIN;
 377                 return cxgb_ulp_iscsi_ctl(adapter, req, data);
 378         case RDMA_GET_PARAMS:
 379         case RDMA_CQ_OP:
 380         case RDMA_CQ_SETUP:
 381         case RDMA_CQ_DISABLE:
 382         case RDMA_CTRL_QP_SETUP:
 383         case RDMA_GET_MEM:
 384                 if (!offload_running(adapter))
 385                         return -EAGAIN;
 386                 return cxgb_rdma_ctl(adapter, req, data);
 387         case GET_RX_PAGE_INFO:
 388                 rx_page_info = data;
 389                 rx_page_info->page_size = tp->rx_pg_size;
 390                 rx_page_info->num = tp->rx_num_pgs;
 391                 break;
 392         default:
 393                 return -EOPNOTSUPP;
 394         }
 395         return 0;
 396 }
 397
 398 /*
 399  * Dummy handler for Rx offload packets in case we get an offload packet before
 400  * proper processing is setup.  This complains and drops the packet as it isn't
 401  * normal to get offload packets at this stage.
 402  */
 403 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
 404                                 int n)
 405 {
 406         CH_ERR(tdev2adap(dev), "%d unexpected offload packets, first data %u\n",
 407                n, ntohl(*(__be32 *)skbs[0]->data));
 408         while (n--)
 409                 dev_kfree_skb_any(skbs[n]);
 410         return 0;
 411 }
 412
 413 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
 414 {
 415 }
 416
 417 void cxgb3_set_dummy_ops(struct t3cdev *dev)
 418 {
 419         dev->recv = rx_offload_blackhole;
 420         dev->neigh_update = dummy_neigh_update;
 421 }
 422
 423 /*
 424  * Free an active-open TID.
 425  */
 426 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
 427 {
 428         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 429         union active_open_entry *p = atid2entry(t, atid);
 430         void *ctx = p->t3c_tid.ctx;
 431
 432         spin_lock_bh(&t->atid_lock);
 433         p->next = t->afree;
 434         t->afree = p;
 435         t->atids_in_use--;
 436         spin_unlock_bh(&t->atid_lock);
 437
 438         return ctx;
 439 }
 440
 441 EXPORT_SYMBOL(cxgb3_free_atid);
 442
 443 /*
 444  * Free a server TID and return it to the free pool.
 445  */
 446 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
 447 {
 448         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 449         union listen_entry *p = stid2entry(t, stid);
 450
 451         spin_lock_bh(&t->stid_lock);
 452         p->next = t->sfree;
 453         t->sfree = p;
 454         t->stids_in_use--;
 455         spin_unlock_bh(&t->stid_lock);
 456 }
 457
 458 EXPORT_SYMBOL(cxgb3_free_stid);
 459
 460 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
 461                       void *ctx, unsigned int tid)
 462 {
 463         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 464
 465         t->tid_tab[tid].client = client;
 466         t->tid_tab[tid].ctx = ctx;
 467         atomic_inc(&t->tids_in_use);
 468 }
 469
 470 EXPORT_SYMBOL(cxgb3_insert_tid);
 471
 472 /*
 473  * Populate a TID_RELEASE WR.  The skb must be already propely sized.
 474  */
 475 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
 476 {
 477         struct cpl_tid_release *req;
 478
 479         skb->priority = CPL_PRIORITY_SETUP;
 480         req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
 481         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 482         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
 483 }
 484
 485 static void t3_process_tid_release_list(struct work_struct *work)
 486 {
 487         struct t3c_data *td = container_of(work, struct t3c_data,
 488                                            tid_release_task);
 489         struct sk_buff *skb;
 490         struct t3cdev *tdev = td->dev;
 491
 492
 493         spin_lock_bh(&td->tid_release_lock);
 494         while (td->tid_release_list) {
 495                 struct t3c_tid_entry *p = td->tid_release_list;
 496
 497                 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
 498                 spin_unlock_bh(&td->tid_release_lock);
 499
 500                 skb = alloc_skb(sizeof(struct cpl_tid_release),
 501                                 GFP_KERNEL | __GFP_NOFAIL);
 502                 mk_tid_release(skb, p - td->tid_maps.tid_tab);
 503                 cxgb3_ofld_send(tdev, skb);
 504                 p->ctx = NULL;
 505                 spin_lock_bh(&td->tid_release_lock);
 506         }
 507         spin_unlock_bh(&td->tid_release_lock);
 508 }
 509
 510 /* use ctx as a next pointer in the tid release list */
 511 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
 512 {
 513         struct t3c_data *td = T3C_DATA(tdev);
 514         struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
 515
 516         spin_lock_bh(&td->tid_release_lock);
 517         p->ctx = (void *)td->tid_release_list;
 518         p->client = NULL;
 519         td->tid_release_list = p;
 520         if (!p->ctx)
 521                 schedule_work(&td->tid_release_task);
 522         spin_unlock_bh(&td->tid_release_lock);
 523 }
 524
 525 EXPORT_SYMBOL(cxgb3_queue_tid_release);
 526
 527 /*
 528  * Remove a tid from the TID table.  A client may defer processing its last
 529  * CPL message if it is locked at the time it arrives, and while the message
 530  * sits in the client's backlog the TID may be reused for another connection.
 531  * To handle this we atomically switch the TID association if it still points
 532  * to the original client context.
 533  */
 534 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
 535 {
 536         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 537
 538         BUG_ON(tid >= t->ntids);
 539         if (tdev->type == T3A)
 540                 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
 541         else {
 542                 struct sk_buff *skb;
 543
 544                 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
 545                 if (likely(skb)) {
 546                         mk_tid_release(skb, tid);
 547                         cxgb3_ofld_send(tdev, skb);
 548                         t->tid_tab[tid].ctx = NULL;
 549                 } else
 550                         cxgb3_queue_tid_release(tdev, tid);
 551         }
 552         atomic_dec(&t->tids_in_use);
 553 }
 554
 555 EXPORT_SYMBOL(cxgb3_remove_tid);
 556
 557 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
 558                      void *ctx)
 559 {
 560         int atid = -1;
 561         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 562
 563         spin_lock_bh(&t->atid_lock);
 564         if (t->afree &&
 565             t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
 566             t->ntids) {
 567                 union active_open_entry *p = t->afree;
 568
 569                 atid = (p - t->atid_tab) + t->atid_base;
 570                 t->afree = p->next;
 571                 p->t3c_tid.ctx = ctx;
 572                 p->t3c_tid.client = client;
 573                 t->atids_in_use++;
 574         }
 575         spin_unlock_bh(&t->atid_lock);
 576         return atid;
 577 }
 578
 579 EXPORT_SYMBOL(cxgb3_alloc_atid);
 580
 581 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
 582                      void *ctx)
 583 {
 584         int stid = -1;
 585         struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
 586
 587         spin_lock_bh(&t->stid_lock);
 588         if (t->sfree) {
 589                 union listen_entry *p = t->sfree;
 590
 591                 stid = (p - t->stid_tab) + t->stid_base;
 592                 t->sfree = p->next;
 593                 p->t3c_tid.ctx = ctx;
 594                 p->t3c_tid.client = client;
 595                 t->stids_in_use++;
 596         }
 597         spin_unlock_bh(&t->stid_lock);
 598         return stid;
 599 }
 600
 601 EXPORT_SYMBOL(cxgb3_alloc_stid);
 602
 603 /* Get the t3cdev associated with a net_device */
 604 struct t3cdev *dev2t3cdev(struct net_device *dev)
 605 {
 606         const struct port_info *pi = netdev_priv(dev);
 607
 608         return (struct t3cdev *)pi->adapter;
 609 }
 610
 611 EXPORT_SYMBOL(dev2t3cdev);
 612
 613 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 614 {
 615         struct cpl_smt_write_rpl *rpl = cplhdr(skb);
 616
 617         if (rpl->status != CPL_ERR_NONE)
 618                 printk(KERN_ERR
 619                        "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
 620                        rpl->status, GET_TID(rpl));
 621
 622         return CPL_RET_BUF_DONE;
 623 }
 624
 625 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
 626 {
 627         struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
 628
 629         if (rpl->status != CPL_ERR_NONE)
 630                 printk(KERN_ERR
 631                        "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
 632                        rpl->status, GET_TID(rpl));
 633
 634         return CPL_RET_BUF_DONE;
 635 }
 636
 637 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
 638 {
 639         struct cpl_act_open_rpl *rpl = cplhdr(skb);
 640         unsigned int atid = G_TID(ntohl(rpl->atid));
 641         struct t3c_tid_entry *t3c_tid;
 642
 643         t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
 644         if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
 645             t3c_tid->client->handlers &&
 646             t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
 647                 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
 648                                                                     t3c_tid->
 649                                                                     ctx);
 650         } else {
 651                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 652                        dev->name, CPL_ACT_OPEN_RPL);
 653                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 654         }
 655 }
 656
 657 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 658 {
 659         union opcode_tid *p = cplhdr(skb);
 660         unsigned int stid = G_TID(ntohl(p->opcode_tid));
 661         struct t3c_tid_entry *t3c_tid;
 662
 663         t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
 664         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 665             t3c_tid->client->handlers[p->opcode]) {
 666                 return t3c_tid->client->handlers[p->opcode] (dev, skb,
 667                                                              t3c_tid->ctx);
 668         } else {
 669                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 670                        dev->name, p->opcode);
 671                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 672         }
 673 }
 674
 675 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
 676 {
 677         union opcode_tid *p = cplhdr(skb);
 678         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 679         struct t3c_tid_entry *t3c_tid;
 680
 681         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 682         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 683             t3c_tid->client->handlers[p->opcode]) {
 684                 return t3c_tid->client->handlers[p->opcode]
 685                     (dev, skb, t3c_tid->ctx);
 686         } else {
 687                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 688                        dev->name, p->opcode);
 689                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 690         }
 691 }
 692
 693 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
 694 {
 695         struct cpl_pass_accept_req *req = cplhdr(skb);
 696         unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 697         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 698         struct t3c_tid_entry *t3c_tid;
 699         unsigned int tid = GET_TID(req);
 700
 701         if (unlikely(tid >= t->ntids)) {
 702                 printk("%s: passive open TID %u too large\n",
 703                        dev->name, tid);
 704                 t3_fatal_err(tdev2adap(dev));
 705                 return CPL_RET_BUF_DONE;
 706         }
 707
 708         t3c_tid = lookup_stid(t, stid);
 709         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 710             t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
 711                 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
 712                     (dev, skb, t3c_tid->ctx);
 713         } else {
 714                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 715                        dev->name, CPL_PASS_ACCEPT_REQ);
 716                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 717         }
 718 }
 719
 720 /*
 721  * Returns an sk_buff for a reply CPL message of size len.  If the input
 722  * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
 723  * is allocated.  The input skb must be of size at least len.  Note that this
 724  * operation does not destroy the original skb data even if it decides to reuse
 725  * the buffer.
 726  */
 727 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
 728                                                gfp_t gfp)
 729 {
 730         if (likely(!skb_cloned(skb))) {
 731                 BUG_ON(skb->len < len);
 732                 __skb_trim(skb, len);
 733                 skb_get(skb);
 734         } else {
 735                 skb = alloc_skb(len, gfp);
 736                 if (skb)
 737                         __skb_put(skb, len);
 738         }
 739         return skb;
 740 }
 741
 742 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
 743 {
 744         union opcode_tid *p = cplhdr(skb);
 745         unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
 746         struct t3c_tid_entry *t3c_tid;
 747
 748         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 749         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 750             t3c_tid->client->handlers[p->opcode]) {
 751                 return t3c_tid->client->handlers[p->opcode]
 752                     (dev, skb, t3c_tid->ctx);
 753         } else {
 754                 struct cpl_abort_req_rss *req = cplhdr(skb);
 755                 struct cpl_abort_rpl *rpl;
 756                 struct sk_buff *reply_skb;
 757                 unsigned int tid = GET_TID(req);
 758                 u8 cmd = req->status;
 759
 760                 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
 761                     req->status == CPL_ERR_PERSIST_NEG_ADVICE)
 762                         goto out;
 763
 764                 reply_skb = cxgb3_get_cpl_reply_skb(skb,
 765                                                     sizeof(struct
 766                                                            cpl_abort_rpl),
 767                                                     GFP_ATOMIC);
 768
 769                 if (!reply_skb) {
 770                         printk("do_abort_req_rss: couldn't get skb!\n");
 771                         goto out;
 772                 }
 773                 reply_skb->priority = CPL_PRIORITY_DATA;
 774                 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
 775                 rpl = cplhdr(reply_skb);
 776                 rpl->wr.wr_hi =
 777                     htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
 778                 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
 779                 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
 780                 rpl->cmd = cmd;
 781                 cxgb3_ofld_send(dev, reply_skb);
 782 out:
 783                 return CPL_RET_BUF_DONE;
 784         }
 785 }
 786
 787 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
 788 {
 789         struct cpl_act_establish *req = cplhdr(skb);
 790         unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
 791         struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
 792         struct t3c_tid_entry *t3c_tid;
 793         unsigned int tid = GET_TID(req);
 794
 795         if (unlikely(tid >= t->ntids)) {
 796                 printk("%s: active establish TID %u too large\n",
 797                        dev->name, tid);
 798                 t3_fatal_err(tdev2adap(dev));
 799                 return CPL_RET_BUF_DONE;
 800         }
 801
 802         t3c_tid = lookup_atid(t, atid);
 803         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 804             t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
 805                 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
 806                     (dev, skb, t3c_tid->ctx);
 807         } else {
 808                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 809                        dev->name, CPL_ACT_ESTABLISH);
 810                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 811         }
 812 }
 813
 814 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
 815 {
 816         struct cpl_trace_pkt *p = cplhdr(skb);
 817
 818         skb->protocol = htons(0xffff);
 819         skb->dev = dev->lldev;
 820         skb_pull(skb, sizeof(*p));
 821         skb_reset_mac_header(skb);
 822         netif_receive_skb(skb);
 823         return 0;
 824 }
 825
 826 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
 827 {
 828         unsigned int hwtid = ntohl(skb->priority) >> 8 & 0xfffff;
 829         unsigned int opcode = G_OPCODE(ntohl(skb->csum));
 830         struct t3c_tid_entry *t3c_tid;
 831
 832         t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
 833         if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
 834             t3c_tid->client->handlers[opcode]) {
 835                 return t3c_tid->client->handlers[opcode] (dev, skb,
 836                                                           t3c_tid->ctx);
 837         } else {
 838                 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
 839                        dev->name, opcode);
 840                 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 841         }
 842 }
 843
 844 static int nb_callback(struct notifier_block *self, unsigned long event,
 845                        void *ctx)
 846 {
 847         switch (event) {
 848         case (NETEVENT_NEIGH_UPDATE):{
 849                 cxgb_neigh_update((struct neighbour *)ctx);
 850                 break;
 851         }
 852         case (NETEVENT_PMTU_UPDATE):
 853                 break;
 854         case (NETEVENT_REDIRECT):{
 855                 struct netevent_redirect *nr = ctx;
 856                 cxgb_redirect(nr->old, nr->new);
 857                 cxgb_neigh_update(nr->new->neighbour);
 858                 break;
 859         }
 860         default:
 861                 break;
 862         }
 863         return 0;
 864 }
 865
 866 static struct notifier_block nb = {
 867         .notifier_call = nb_callback
 868 };
 869
 870 /*
 871  * Process a received packet with an unknown/unexpected CPL opcode.
 872  */
 873 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
 874 {
 875         printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
 876                *skb->data);
 877         return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
 878 }
 879
 880 /*
 881  * Handlers for each CPL opcode
 882  */
 883 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
 884
 885 /*
 886  * Add a new handler to the CPL dispatch table.  A NULL handler may be supplied
 887  * to unregister an existing handler.
 888  */
 889 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
 890 {
 891         if (opcode < NUM_CPL_CMDS)
 892                 cpl_handlers[opcode] = h ? h : do_bad_cpl;
 893         else
 894                 printk(KERN_ERR "T3C: handler registration for "
 895                        "opcode %x failed\n", opcode);
 896 }
 897
 898 EXPORT_SYMBOL(t3_register_cpl_handler);
 899
 900 /*
 901  * T3CDEV's receive method.
 902  */
 903 int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
 904 {
 905         while (n--) {
 906                 struct sk_buff *skb = *skbs++;
 907                 unsigned int opcode = G_OPCODE(ntohl(skb->csum));
 908                 int ret = cpl_handlers[opcode] (dev, skb);
 909
 910 #if VALIDATE_TID
 911                 if (ret & CPL_RET_UNKNOWN_TID) {
 912                         union opcode_tid *p = cplhdr(skb);
 913
 914                         printk(KERN_ERR "%s: CPL message (opcode %u) had "
 915                                "unknown TID %u\n", dev->name, opcode,
 916                                G_TID(ntohl(p->opcode_tid)));
 917                 }
 918 #endif
 919                 if (ret & CPL_RET_BUF_DONE)
 920                         kfree_skb(skb);
 921         }
 922         return 0;
 923 }
 924
 925 /*
 926  * Sends an sk_buff to a T3C driver after dealing with any active network taps.
 927  */
 928 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
 929 {
 930         int r;
 931
 932         local_bh_disable();
 933         r = dev->send(dev, skb);
 934         local_bh_enable();
 935         return r;
 936 }
 937
 938 EXPORT_SYMBOL(cxgb3_ofld_send);
 939
 940 static int is_offloading(struct net_device *dev)
 941 {
 942         struct adapter *adapter;
 943         int i;
 944
 945         read_lock_bh(&adapter_list_lock);
 946         list_for_each_entry(adapter, &adapter_list, adapter_list) {
 947                 for_each_port(adapter, i) {
 948                         if (dev == adapter->port[i]) {
 949                                 read_unlock_bh(&adapter_list_lock);
 950                                 return 1;
 951                         }
 952                 }
 953         }
 954         read_unlock_bh(&adapter_list_lock);
 955         return 0;
 956 }
 957
 958 void cxgb_neigh_update(struct neighbour *neigh)
 959 {
 960         struct net_device *dev = neigh->dev;
 961
 962         if (dev && (is_offloading(dev))) {
 963                 struct t3cdev *tdev = dev2t3cdev(dev);
 964
 965                 BUG_ON(!tdev);
 966                 t3_l2t_update(tdev, neigh);
 967         }
 968 }
 969
 970 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
 971 {
 972         struct sk_buff *skb;
 973         struct cpl_set_tcb_field *req;
 974
 975         skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
 976         if (!skb) {
 977                 printk(KERN_ERR "%s: cannot allocate skb!\n", __FUNCTION__);
 978                 return;
 979         }
 980         skb->priority = CPL_PRIORITY_CONTROL;
 981         req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
 982         req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
 983         OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
 984         req->reply = 0;
 985         req->cpu_idx = 0;
 986         req->word = htons(W_TCB_L2T_IX);
 987         req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
 988         req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
 989         tdev->send(tdev, skb);
 990 }
 991
 992 void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
 993 {
 994         struct net_device *olddev, *newdev;
 995         struct tid_info *ti;
 996         struct t3cdev *tdev;
 997         u32 tid;
 998         int update_tcb;
 999         struct l2t_entry *e;
1000         struct t3c_tid_entry *te;
1001
1002         olddev = old->neighbour->dev;
1003         newdev = new->neighbour->dev;
1004         if (!is_offloading(olddev))
1005                 return;
1006         if (!is_offloading(newdev)) {
1007                 printk(KERN_WARNING "%s: Redirect to non-offload "
1008                        "device ignored.\n", __FUNCTION__);
1009                 return;
1010         }
1011         tdev = dev2t3cdev(olddev);
1012         BUG_ON(!tdev);
1013         if (tdev != dev2t3cdev(newdev)) {
1014                 printk(KERN_WARNING "%s: Redirect to different "
1015                        "offload device ignored.\n", __FUNCTION__);
1016                 return;
1017         }
1018
1019         /* Add new L2T entry */
1020         e = t3_l2t_get(tdev, new->neighbour, newdev);
1021         if (!e) {
1022                 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1023                        __FUNCTION__);
1024                 return;
1025         }
1026
1027         /* Walk tid table and notify clients of dst change. */
1028         ti = &(T3C_DATA(tdev))->tid_maps;
1029         for (tid = 0; tid < ti->ntids; tid++) {
1030                 te = lookup_tid(ti, tid);
1031                 BUG_ON(!te);
1032                 if (te && te->ctx && te->client && te->client->redirect) {
1033                         update_tcb = te->client->redirect(te->ctx, old, new, e);
1034                         if (update_tcb) {
1035                                 l2t_hold(L2DATA(tdev), e);
1036                                 set_l2t_ix(tdev, tid, e);
1037                         }
1038                 }
1039         }
1040         l2t_release(L2DATA(tdev), e);
1041 }
1042
1043 /*
1044  * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1045  * The allocated memory is cleared.
1046  */
1047 void *cxgb_alloc_mem(unsigned long size)
1048 {
1049         void *p = kmalloc(size, GFP_KERNEL);
1050
1051         if (!p)
1052                 p = vmalloc(size);
1053         if (p)
1054                 memset(p, 0, size);
1055         return p;
1056 }
1057
1058 /*
1059  * Free memory allocated through t3_alloc_mem().
1060  */
1061 void cxgb_free_mem(void *addr)
1062 {
1063         unsigned long p = (unsigned long)addr;
1064
1065         if (p >= VMALLOC_START && p < VMALLOC_END)
1066                 vfree(addr);
1067         else
1068                 kfree(addr);
1069 }
1070
1071 /*
1072  * Allocate and initialize the TID tables.  Returns 0 on success.
1073  */
1074 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1075                          unsigned int natids, unsigned int nstids,
1076                          unsigned int atid_base, unsigned int stid_base)
1077 {
1078         unsigned long size = ntids * sizeof(*t->tid_tab) +
1079             natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1080
1081         t->tid_tab = cxgb_alloc_mem(size);
1082         if (!t->tid_tab)
1083                 return -ENOMEM;
1084
1085         t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1086         t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1087         t->ntids = ntids;
1088         t->nstids = nstids;
1089         t->stid_base = stid_base;
1090         t->sfree = NULL;
1091         t->natids = natids;
1092         t->atid_base = atid_base;
1093         t->afree = NULL;
1094         t->stids_in_use = t->atids_in_use = 0;
1095         atomic_set(&t->tids_in_use, 0);
1096         spin_lock_init(&t->stid_lock);
1097         spin_lock_init(&t->atid_lock);
1098
1099         /*
1100          * Setup the free lists for stid_tab and atid_tab.
1101          */
1102         if (nstids) {
1103                 while (--nstids)
1104                         t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1105                 t->sfree = t->stid_tab;
1106         }
1107         if (natids) {
1108                 while (--natids)
1109                         t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1110                 t->afree = t->atid_tab;
1111         }
1112         return 0;
1113 }
1114
1115 static void free_tid_maps(struct tid_info *t)
1116 {
1117         cxgb_free_mem(t->tid_tab);
1118 }
1119
1120 static inline void add_adapter(struct adapter *adap)
1121 {
1122         write_lock_bh(&adapter_list_lock);
1123         list_add_tail(&adap->adapter_list, &adapter_list);
1124         write_unlock_bh(&adapter_list_lock);
1125 }
1126
1127 static inline void remove_adapter(struct adapter *adap)
1128 {
1129         write_lock_bh(&adapter_list_lock);
1130         list_del(&adap->adapter_list);
1131         write_unlock_bh(&adapter_list_lock);
1132 }
1133
1134 int cxgb3_offload_activate(struct adapter *adapter)
1135 {
1136         struct t3cdev *dev = &adapter->tdev;
1137         int natids, err;
1138         struct t3c_data *t;
1139         struct tid_range stid_range, tid_range;
1140         struct mtutab mtutab;
1141         unsigned int l2t_capacity;
1142
1143         t = kcalloc(1, sizeof(*t), GFP_KERNEL);
1144         if (!t)
1145                 return -ENOMEM;
1146
1147         err = -EOPNOTSUPP;
1148         if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1149             dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1150             dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1151             dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1152             dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1153             dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1154                 goto out_free;
1155
1156         err = -ENOMEM;
1157         L2DATA(dev) = t3_init_l2t(l2t_capacity);
1158         if (!L2DATA(dev))
1159                 goto out_free;
1160
1161         natids = min(tid_range.num / 2, MAX_ATIDS);
1162         err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1163                             stid_range.num, ATID_BASE, stid_range.base);
1164         if (err)
1165                 goto out_free_l2t;
1166
1167         t->mtus = mtutab.mtus;
1168         t->nmtus = mtutab.size;
1169
1170         INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1171         spin_lock_init(&t->tid_release_lock);
1172         INIT_LIST_HEAD(&t->list_node);
1173         t->dev = dev;
1174
1175         T3C_DATA(dev) = t;
1176         dev->recv = process_rx;
1177         dev->neigh_update = t3_l2t_update;
1178
1179         /* Register netevent handler once */
1180         if (list_empty(&adapter_list))
1181                 register_netevent_notifier(&nb);
1182
1183         add_adapter(adapter);
1184         return 0;
1185
1186 out_free_l2t:
1187         t3_free_l2t(L2DATA(dev));
1188         L2DATA(dev) = NULL;
1189 out_free:
1190         kfree(t);
1191         return err;
1192 }
1193
1194 void cxgb3_offload_deactivate(struct adapter *adapter)
1195 {
1196         struct t3cdev *tdev = &adapter->tdev;
1197         struct t3c_data *t = T3C_DATA(tdev);
1198
1199         remove_adapter(adapter);
1200         if (list_empty(&adapter_list))
1201                 unregister_netevent_notifier(&nb);
1202
1203         free_tid_maps(&t->tid_maps);
1204         T3C_DATA(tdev) = NULL;
1205         t3_free_l2t(L2DATA(tdev));
1206         L2DATA(tdev) = NULL;
1207         kfree(t);
1208 }
1209
1210 static inline void register_tdev(struct t3cdev *tdev)
1211 {
1212         static int unit;
1213
1214         mutex_lock(&cxgb3_db_lock);
1215         snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1216         list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1217         mutex_unlock(&cxgb3_db_lock);
1218 }
1219
1220 static inline void unregister_tdev(struct t3cdev *tdev)
1221 {
1222         mutex_lock(&cxgb3_db_lock);
1223         list_del(&tdev->ofld_dev_list);
1224         mutex_unlock(&cxgb3_db_lock);
1225 }
1226
1227 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1228 {
1229         struct t3cdev *tdev = &adapter->tdev;
1230
1231         INIT_LIST_HEAD(&tdev->ofld_dev_list);
1232
1233         cxgb3_set_dummy_ops(tdev);
1234         tdev->send = t3_offload_tx;
1235         tdev->ctl = cxgb_offload_ctl;
1236         tdev->type = adapter->params.rev == 0 ? T3A : T3B;
1237
1238         register_tdev(tdev);
1239 }
1240
1241 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1242 {
1243         struct t3cdev *tdev = &adapter->tdev;
1244
1245         tdev->recv = NULL;
1246         tdev->neigh_update = NULL;
1247
1248         unregister_tdev(tdev);
1249 }
1250
1251 void __init cxgb3_offload_init(void)
1252 {
1253         int i;
1254
1255         for (i = 0; i < NUM_CPL_CMDS; ++i)
1256                 cpl_handlers[i] = do_bad_cpl;
1257
1258         t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1259         t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1260         t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1261         t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1262         t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1263         t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1264         t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1265         t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1266         t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1267         t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1268         t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1269         t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1270         t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1271         t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1272         t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1273         t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1274         t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1275         t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1276         t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1277         t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1278         t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1279         t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1280         t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1281         t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1282         t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
1283 }